TY - JOUR
T1 - Structural properties of iron phases formed on low alloy steels immersed in sodium chloride-rich solutions
AU - Pérez, F. R.
AU - Barrero, C. A.
AU - Arnache, O.
AU - Sánchez, L. C.
AU - García, K. E.
AU - Hight Walker, A. R.
N1 - Funding Information:
Authors greatly acknowledge to CODI-Universidad de Antioquia (Projects E01248CE and Sustainability Programs during 2007–2008 for both the Solid State and the Scientific Instrumentation and Microelectronic Groups) and CIDI-Universidad Pontificia Bolivariana (Project 889-05/06-27) for financial support. Thanks go to M. Pérez of Universidad Nacional of Colombia Sede-Medellín for the SEM measurements.
PY - 2009/5/1
Y1 - 2009/5/1
N2 - Products of corrosion were obtained from low alloy steels submitted to total immersion tests in solutions containing sodium chloride at different concentrations, during seven days. In order to properly characterize the adherent (AR) and the non-adherent rusts (NAR), a methodology including room temperature Mössbauer spectrometry, diffuse reflectance infrared Fourier transform spectroscopy, Raman spectroscopy, scanning electron microscopy and X-ray diffraction was addressed. The techniques showed that the AR samples were composed of non-stoichiometric magnetite, goethite, akaganeite and lepidocrocite. The composition of the NAR samples was the same, but with very small amounts of magnetite. Different cell parameters and mean crystallite sizes were found for all phases presented in AR and the NAR samples. The corrosion rates were higher than 580 μm/y. The ratio of the abundances of goethite to the sum of lepidocrocite, akaganeite and magnetite were less than one.
AB - Products of corrosion were obtained from low alloy steels submitted to total immersion tests in solutions containing sodium chloride at different concentrations, during seven days. In order to properly characterize the adherent (AR) and the non-adherent rusts (NAR), a methodology including room temperature Mössbauer spectrometry, diffuse reflectance infrared Fourier transform spectroscopy, Raman spectroscopy, scanning electron microscopy and X-ray diffraction was addressed. The techniques showed that the AR samples were composed of non-stoichiometric magnetite, goethite, akaganeite and lepidocrocite. The composition of the NAR samples was the same, but with very small amounts of magnetite. Different cell parameters and mean crystallite sizes were found for all phases presented in AR and the NAR samples. The corrosion rates were higher than 580 μm/y. The ratio of the abundances of goethite to the sum of lepidocrocite, akaganeite and magnetite were less than one.
KW - Corrosion and protection
KW - Mössbauer spectrometry
KW - Raman and infrared spectroscopy
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=64149085092&partnerID=8YFLogxK
U2 - 10.1016/j.physb.2008.12.020
DO - 10.1016/j.physb.2008.12.020
M3 - Artículo en revista científica indexada
AN - SCOPUS:64149085092
SN - 0921-4526
VL - 404
SP - 1347
EP - 1353
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
IS - 8-11
ER -